Method of making bearings



E. O. GOERKE ET AL' .METHOD OF MAKING BERINGS Filed NOV. 8, 1939 July14, 1942.

INVENTOR.

EOw/h O. Goe/'ke BY COf/,GS zf-[Eyye/rscw//ef- Y ATTO EYS.

Paiented July`14, 1942 l UNITED STATES -PATENT OFFICE f METHOD F MAKINGBEARINGS Edwin 0.l Goerke, Dearborn, and Charles E. g

Eggenschwiler, Detroit, Mich., assignors to Bohn Aluminum & BrassCorporation, Detroit, f Mich., a corporation of Michigan ApplicationNovember Vs, 193s, serial No. 303,451

` 4 claims. (ci. .2s-149.5)

spinning operation. After thebearing metal has become solidified theshell is sawed into sections,

the saw cuts passing through the bearing metal in the grooves of theshell -to produce bearing sections having flanges at both ends, thelayer of bearing metal covering the` outer' faces of the langes as Wellas the'inner periphery of the secion. n I

These and other objects and advantages, of the invention will becomeapparent as the "description proceeds. u

While a preferred form of the invention is disclosed herein for purposesof illustration, it should be understood that various changes may bemade in the method without departing fromA the spirit bell end I5. Thejoints between the pieces I0, II, I2 and I3 ar welded up, and one of thediscs, I1, is Welded in place.

- Prior to complete closing'of the shell materials. f for forming thelining are introduced into it. These consist of the bearing metal,`inthis instance commercially pure silver, a suitable flux, and materialsto produce a reducing atmosphere, for example a combination oflubricating oil and naphtha. After these materials have been loaded intothe shell the vclosure disc I8, which has a blow hole 20, is welded inplace.

4The closed shell isn heated to a temperature `sufficient to melt thebearing metal and is then rotated rapidly in order to centrifugally castthe bearing metal on the interior wall of the shell. The. flux helps tobond the silver to the steel, while the reducing atmosphere preventsoxidation of the silver. The rotation of the shell is continued while itis cooling to solidify the layer of bearing metal. As the result of thiscentrifugal casting the bearing metal forms an even, dense layer on theinner periphery of the shell and completely fills the grooves` I9, asshown in Fig. 2.

The next step in forming the bearings is to cut vthe shell cross-axiallyon the saw lines 2i inof the invention as herein set forth and claimed.

ln the drawing:

Fig. 1 is an elevation, partly in section,A of a shell as assembled inone step of the process.

Fig. 2 is a view similar to Fig. 1 butnshowing the parts after thebearing metal has been cast in the shell.

Fig. 31 is an elevation partly in section of `a bearing section in therough after being severed from the shell.

Fig. 4 is a view similar to Fig. the completed bearing. A 1 The methodof the invention starts with the assembly of a shell formed of severalindividual cylindrical pieces, Ill, II, I2 and I3, which are 3 butShowing dicated in Fig. 2, thus forming the pieces I I and I2 into tworough bearings as illustrated in Fig. A 3. The end pieces I0 and I3 arenot used for bearings and may be treated for recovery of the bearingmetal. Y 'I'fhe rough bearings of Fig. 3 `are then subjected tomachining operations to removel the outer rim of the belll I5 and' totrue up the surfaces, after which the bearing takes the form shown inFig'. 4, where the steel shell 22 has ,outturned end flanges, acontinuous layer 23 of bearing metal covering thev inner wall of thebearing made of a suitable backing material, such as steel. I

Each of the pieces IIand I2 has a flange I4 and a bell end I5, the bellbeing formed with 8..

counterbore i6. The end piece III has a flange I4 at one end and iscounterbored at the other end to receive a closure disc I1, while theother end piece I3 is similarly fitted with a disc I8 but has at itsinner end a bell mouth I5. y

Any desired number of the pieces II and I2 may be used in forming theclosed shell, but in the exampleillustrated only two oithese pieces areprovided. In assembling the shell each of the flanges I4 is fitted intoa counterbore I6, leaving'an annulargroove I9 onb the inside of each andthe outer surfaces of the end anges.

The bearing illustrated is a single cylindrical piece, but if desired itmay be cut into two semicylindrical sections accordingto practices knownlin the art.

It will be apparent that the method described above provides aconvenient and economical way of forming 'bearings with flanges coveredby the` layer of bearing material.

We claim: L

1. In a method of forming bearings by hotf spinning a layer of bearingmetal on the inner periphery ofa shell o f supporting metal, theimprovement which comprises: assembling a plurality of steel tubesections having complementary members comprising bell ends and anges;

forming counterbores on some ofthe complementary members; forming ashell bywelding the tube sections together with alternate complementarymembers interiltted with the counterbores to form interior grooves oflarger diameter than the normalV diameter'of the tube sections; placingwithin the shell a charge consisting of bearing metal, ux, and materialto produce a reducing atmosphere; covering the ends of the shell;spinning the tube while the bearing metal solldies, thereby casting thebearing metal so as to form a level coating on the inner peripheral wallof the shell; severing the shell by saw cuts through said grooves toform rough bearings; removing excess material and finishing the roughbearings 2. In a method of forming bearings by hot .spinning a layer ofbearing metal on the inner periphery of a shell of supporting metal, theiml provement which comprises: assembling a plurality of steel tubesections having complementary members comprising bell ends and anges;

intertting the anges with the bell ends to form interior circulargrooves of larger diameter than the normal inner diameter of the tubesections; welding the sections together to form a shell; placing withinthe shell a charge consisting of bearing metal, flux, and material toproduce a "reducing atmosphere; covering the ends of the bearings withbearing metal extending over their inner circumferential walls and overthe end ilanges.

3. In a method of forming bearings by hot spinning a layer of bearingmetal on the inner periphery of asshell of supporting metal, theimprovement which comprises: assembling a plurality of steel tubesections having -complementary members comprising bell ends and flanges;forming the bell ends withcounterbores which receive the ilangesbut holdthem spaced from the bottoms of the bell ends; intertting the sectionswith the ilanges resting in the counterbores to form interior circulargrooves of larger diameter than the normal inner diameter of the tubesections; welding the sections together to form a shell; placing withinthe shell a charge consisting of bearing metal, ux, and material toproduce a reducing atmosphere; coveringfthe ends of the shell; heatingthe shell to a temperature sulcient to melt the bearing metal; spinningthe tube while the bearing metal solidies, therea by casting thebearing-metal so as to form a level coating on the inner peripheral wallof the shell; severing `the shell by saw cuts passing through the middleparts of said grooves to form rough bearings; removing excess materialfrom the rough bearings and nishing them to form,

flanged bearings with bearing metal extending over their innercircumferential walls and over the end flanges.

4. In a method of forming bearings by. hot I 4 form a coating on theinner peripheral Wall of the shell, the inner surface of the coatingforming a smooth cylindrical bore; severing the shell by saw cutspassing through the middle parts of said grooves to form rough bearingshaving at each end a ange faced by bearing metal; and finishing therough bearings.

EDWIN 0. GOERKE.

CHARLES E. EGGENSCHWILER.

